摘要
目的:考察羟丙基甲基纤维素(hydroxypropylmethyl cellulose,HPMC)作为亲水凝胶材料和调控层材料对骨架型缓释制剂体外释放的影响。方法:以盐酸地尔硫卓为水溶性模型药物,HPMC为亲水凝胶材料,分别制备盐酸地尔硫卓缓释片和具有调控层的双层骨架片,考察HPMC作为凝胶骨架材料和调控层材料对水溶性药物缓释制剂体外释放的影响。结果:改变HPMC的黏度,调节其用量由20%至40%可以减慢药物释放,但具有一定的限度;联合应用5%～20%的羧甲基纤维素钠(carboxymethylcellulose sodium,CMC-Na)为骨架材料可以显著减慢药物体外前期的释放,达到24 h持续释放;当以HPMC和乙基纤维素(ethylcellulose,EC)为调控层辅料制备双层骨架片时,增加调控层的重量(为含药层的10%～40%)及调控层中HPMC的比例,能减慢药物释放,尤其减少了前期突释现象。结论:HPMC的黏度、用量及与骨架材料的联合应用等对药物的释放影响较大;在缓释片的基础上加上一层不含药物的调控层制备双层骨架片,可以有效控制缓释药物前期释放过快,改变药物释放规律。
Objective：To study the influence of HPMC as hydrophilic matrix materials and controlled- layer components on the drug release of sustained-release matrix tablets and bilayer tablets. Methods： Dihiazem hydrochloride was chosen as the water-soluble model drug to prepare different kinds of matrix tablets and double layer tablets with different formulations, and evaluate how the levels and grades of HPMC affect the drug release in sustained-release tablets and bilayer tablets. Results： HPMC with high viscosity and the amount of 20%-40% could delay the drug release to certain degree, but it was diffi- cult to further slow down the drug release up to 24 h, especially for a water soluble drug. Combining HPMC with 5%-20% of CMC-Na was proven to be an effective way to achieve the 24 h release profile with the water soluble drug. HPMC was also investigated as a component in the double layer tablet as base layer. Drug release was complicated compared with EC as the base layer in the double layer tablet due to the great swelling ability of HPMC. HPMC＇ s larger swilling let it form a big cap to retard the drug release, which could significantly affect the drug release with a large ratio of the base layer to the drug layer; furthermore increasing the quality of 10%-40% of the base layer and the proportion of HPMC could reduce the initial burst release. Conclusion： The grade/level of HPMC and combinations with other matrix materials had a big impact on the drug release. HPMC could be used in the base layer of the double tablet to alternate the drug release profile, and reduce the initial burst release of the double-layer matrix tablet, and potentially change the drug mechanism.
出处
《北京大学学报（医学版）》
CAS
CSCD
北大核心
2013年第2期291-296,共6页
Journal of Peking University:Health Sciences
关键词
甲基纤维素
迟效制剂
药物释放系统
Methylcellulose
Delayed-action preparations
Drug delivery systems
